# Only enable this if you think you know what you’re doing. This is not
# supported yet:
#obj-m += dahdi_echocan_oslec.o
#
# A quick and dirty way to build OSLEC, if you happened to place it
# yourself in the dahdi source tree. This is experimental. See README
# regarding OSLEC.
#obj-m += ../staging/echo/

Deverá ficar desta forma:

# Only enable this if you think you know what you’re doing. This is not
# supported yet:obj-m += dahdi_echocan_oslec.o
#
# A quick and dirty way to build OSLEC, if you happened to place it
# yourself in the dahdi source tree. This is experimental. See README
# regarding OSLEC.obj-m += ../staging/echo/